1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Olegator [25]
2 years ago
12

Which expression is equivalent to Cosine (StartFraction pi Over 2 EndFraction r) for all values of r?.

Mathematics
1 answer:
Lelechka [254]2 years ago
4 0

The expression that is equivalent to Cos(\frac{\pi }{2}+r ) is -Sinr.

Given trigonometric expression is:

Cos(\frac{\pi }{2}+r )

<h3>What is the value of Cos(\frac{\pi }{2}+\theta )?</h3>

The value of Cos(\frac{\pi }{2}+\theta ) is -Sin\theta because \frac{\pi }{2} +\theta lies in the second quadrant and the cosine function is negative in the second quadrant.

So, Cos(\frac{\pi }{2}+r )= -Sin r

The range of sine and cosine functions is the same i.e. [-1,1].

Both the functions are periodic functions with periods 2π.

Hence, the expression that is equivalent to Cos(\frac{\pi }{2}+r ) is -Sinr.

To get more about trigonometric functions visit:

brainly.com/question/2193113

You might be interested in
A ceramic vase that cost an antique store $5 was marked $20. What is the percentage markup on the price of the ceramic vase?
Anika [276]
The answer would be 75%%%%
8 0
3 years ago
Evaluate: 3x^2 + y when x=1 and y=-3 *
Sliva [168]

Answer:

0

Step-by-step explanation:

x=1 and y=-3

so 3x^2 + y = 3*1^2 + (-3)

= 3* 1 -3

=0

4 0
3 years ago
-5/6 - 17/18 - (-2/9)
Sunny_sXe [5.5K]

First, let's fine the decimal of each fraction.


-5 Divided By 6 = -0.83333333333

17 Divided By 18 = 0.94444444444

-2 Divided By 9 = -0.22222222222



-5/6 - 17/18 - (-2/9) = -1.55555555556


8 0
3 years ago
What is the equation of a line, in general form, that passes through point (1, -2) and has a slope of 1/3. 1.x - 3 y - 7 = 2.x -
Nutka1998 [239]

Answer:

x- 3y - 7=0

Step-by-step explanation:

the line in the slope-intercept form:

  • y= mx+b

m= 1/3 and point given (1, -2) by using which we find y-intercept:

  • b= y-1/3x
  • b= -2- 1/3*1= - 7/3
  • y= 1/3x- 7/3

General form of a line is: ax+by+c= 0

converting:

  • y= 1/3x- 7/3  ⇒  3y= x- 7  ⇒  x- 3y - 7=0
5 0
3 years ago
8x-18=30 math homework I need help
horsena [70]
Ok i will give you a hint ok look subtract 18-30 then you will get yhe answef for 8× ok try it
7 0
3 years ago
Read 2 more answers
Other questions:
  • A friend of yours is not taking statistics, wonders why it is that anyone would choose to take a sample. "Obviously," she says,
    12·1 answer
  • What is the slope of the line <br><br> A. 0<br> B. 1<br> C. -4<br> D. Undefined
    6·2 answers
  • Discrete and continuous random variables
    11·1 answer
  • Write an equation of the line in slope-intercept form that passes through the given point and is parralel to the given line (-1,
    5·1 answer
  • Factor completely: x2 - 8x + 16
    14·2 answers
  • What is the difference between 0.05 and 0.5
    13·1 answer
  • 4. Which shows that these two rectangles are similar?
    10·1 answer
  • What is the average rate of change for this quadratic function for the interval
    5·2 answers
  • PLEASE ANSWER I WILL GIVE YOU BRAINIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    8·2 answers
  • A baseball player on a professional baseball team has 207 hits in 575 at-bats. What
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!